Subtract 45/50 from 30/21
1st number: 1 9/21, 2nd number: 45/50
30/21 - 45/50 is 37/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 50 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 21 × 50 = 1050,
30/21 = 30 × 50/21 × 50 = 1500/1050 - Likewise, for the 2nd fraction, since 50 × 21 = 1050,
45/50 = 45 × 21/50 × 21 = 945/1050 - Subtract the two like fractions:
1500/1050 - 945/1050 = 1500 - 945/1050 = 555/1050 - After reducing the fraction, the answer is 37/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-45/50 30/21-90/50 30/42-45/50 90/21-45/50 30/63-45/50